one fable-low hijack cell
pair haskell / r
envelope code_haskell_alt
ordering BA
effort low
Haskell alternative operator — '{X} <|> {Y}' (Alternative class).
verdictpicked r (second-offered)
· classifierB
· tiernone
response (200 chars)
# `<|>` in Haskell
`<|>` is the **choice operator** from the `Alternative` typeclass (in `Control.Applicative`):
```haskell
class Applicative f => Alternative f where
empty :: f a
(<|>) :: f a -
neighbors